Measurements of Turbulent Mixing and Subsiding Shells in Trade Wind Cumuli
Measurements of Turbulent Mixing and Subsiding Shells in Trade Wind Cumuli
复制标题
信风积云中湍流混合和沉降壳层的测量
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
R. Shaw
中科院分区：
文献类型：
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作者：
J. Katzwinkel;H. Siebert;T. Heus;R. Shaw
利用机载云湍流观测系统对信风积云边缘的湍流、热力学和微物理结构进行了高分辨率的测量。横向卷吸进入云区的欠饱和空气导致蒸发冷却效应。负浮力空气部分地增强了补偿下沉气流，在云边缘形成下沉壳。基于所提出的观测结果，沉降壳层被划分为一个湍流和潮湿的内壳层附近的云内部和一个nonbuoyant，nonturbulent外壳。在信风区，连续发展的浅积云在一天内允许分析的属性，这两个壳作为不同的云演化阶段的函数。根据云的性质，将浅积云分为活跃增长、减速和溶解。随着积云从活跃生长到溶解的演变，亚饱和环境空气在大气中的混合越来越深。
AbstractHigh-resolution measurements of the turbulent, thermodynamic, and microphysical structure of the edges of trade wind cumuli have been performed with the Airborne Cloud Turbulence Observation System. Lateral entrainment of subsaturated air into the cloud region leads to an evaporative cooling effect. The negatively buoyant air partly enhances the compensating downdraft, forming a subsiding shell at cloud edge. Based on the presented observations, the subsiding shell is divided into a turbulent and humid inner shell adjacent to the cloud interior and a nonbuoyant, nonturbulent outer shell. In the trade wind region, continuous development of shallow cumuli over the day allows for an analysis of the properties of both shells as a function of different cloud evolution stages. The shallow cumuli are divided into actively growing, decelerated, and dissolving based on cloud properties. As the cumuli evolve from actively growing to dissolving, the subsaturated environmental air is mixed deeper and deeper i...
巴巴多斯上空信风积云的精细尺度结构——CARRIBA项目简介
影响因子：
6.3
作者：
Siebert;M. Beals;J. Bethke;E. Bierwirth;T. Conrath;K. Dieckmann;F. Ditas;A. Ehrlich;D. Farrell;S. Hartmann;M. A. Izaguirre;J. Katzwinkel;L. Nuijens;G. Roberts;M. Schäfer;R. A. Shaw;T. Schmeissner;I. Serikov;B. Stevens;F. Stratmann
通讯作者：
F. Stratmann